pseudoproct

noun2

1. •
   The anal opening on the pseudembryo of an echinoderm.

   • The pseudostome and pseudoproct become obscure and are shortly obliterated, the sarcoid forming a thick, smooth, uniform layer over the stem and over its terminal disk. — 1865
2. •
   A false osculum or secondary opening which replaces the original osculum of a sponge.